With the ATK, there are 2 options. Standalone and Apex. Assuming you have a full Apex set up:
The FMM has aquabus ports and a 24v port.
On the pmup, there is one wire (24v power) that needs to be plugged in to the EBB, Apex or the FMM module with power supply. If you are plugging it into the FMM module, you need to use the 24v 36W power supply for the FMM.
The aquabus should be plugged into either another module with an open port, EBB or the Apex unit.
If the pmup isn't plugged into the FMM w/ power, EBB or Apex unit, it will not work.
The aquabus is only for data and low voltage power for the FMM module. If you plug the pmup into the FMM module without a power supply providing 24v power to the FMM, it will not work.
The sensors should be plugged into the FMM and note the order of each, so you can complete the programming.
Also note the 24v port you use as that "outlet" will be needed to define the programming.
The programming turns the pump on/off using the 24v port "outlet" and the sensors are the triggers. Everything else in the programming defines the parameters as to how long, or if it should/should not turn on based on other events/triggers.
To manually turn on the pump, you can plug it into a 24v port on the EBB or Apex and turn that 24v outlet on through the Apex Fusion interface.